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CYT-1 concentric dropping-fishing type gas lifting tool and use method thereof

A CYT-1, concentric technology, used in earth-moving drilling, production of fluids, wellbore/well components, etc., can solve the problem of low success rate of gas lift valve casting, formation damage by killing fluid, and increased valve inspection times. problem, to achieve the effect of simple and reliable casting and fishing, improving the success rate of casting and fishing, and not easy to scale

Active Publication Date: 2015-04-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the post-production of gas lift wells, the adjustment of gas lift parameters is relatively frequent, resulting in frequent operations of some gas lift wells and increased valve inspection times
At this time, the fixed gas lift has shown its limitations: the valve inspection operation can only be realized by tripping the pipe string (workover), which is not conducive to the adjustment of gas lift parameters, and the construction cost is high and the cycle is long, which may easily lead to pressure loss. Well Fluids Damage Formation
[0004] At present, eccentric mandrels are generally used at home and abroad to implement fishing-type gas lifts to solve the problem of lifting and lowering pipe strings for fixed gas lift inspection valve operations. The operation requirements are high, and the success rate of gas lift valve fishing is low

Method used

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  • CYT-1 concentric dropping-fishing type gas lifting tool and use method thereof
  • CYT-1 concentric dropping-fishing type gas lifting tool and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: as figure 1 , figure 2 As shown, a method for using a CYT-1 concentric throwing-and-fishing air-lift tool includes the following steps: the air-lift valve and the throwing-and-fishing mandrel are concentrically designed, and the gas-lift valve is lowered into the concentric mandrel by wire operation. During gas lift, the injected high-pressure gas enters through the gas flow channel on the side of the working cylinder, and after opening the gas lift valve, it mixes with the liquid in the well, and then lifts the mixed liquid upward through the annular channel in the working cylinder. Among them, the fishing-type gas lift valve has an outer diameter of 2.26in (Φ57.4mm), and its bellows (single whole, not two welded) can withstand internal pressure of 25MPa (nitrogen-filled pressure) and internal and external pressure difference of 35MPa; supporting concentric The maximum outer diameter of the type gas lift mandrel is 145mm, and the minimum diameter is 58....

Embodiment 2

[0031] Embodiment 2: as figure 1 , figure 2 as shown,

[0032] A concentric fishing-type gas lift tool mainly includes a fishing-type gas lift valve 1, a valve bag 2 and a concentric gas-lift mandrel 3; wherein, the air-lift mandrel and the gas-water flow channel 4 (10 A through hole with a diameter of 19mm) adopts a concentric structure; the fishing-type air lift valve 1 is built in the valve bag 2, and the valve bag 2 is locked by the X-shaped lock core 5 and the concentric air lift mandrel 3; Two check valves 6 are mounted symmetrically on the cylinder body outside of the work cylinder 3 .

[0033] During gas lift, the injected high-pressure gas enters through the air flow channel 6 (one-flow valve) on the side of the working cylinder, and after opening the gas lift valve, it mixes with the liquid in the well, and then passes through the gas-water flow channel 4 (10 diameters of 19mm in the working cylinder) through holes) to lift the mixed liquid upward.

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Abstract

The invention provides a concentric dropping-fishing type gas lifting tool and a use method thereof, and belongs to the technical field of petroleum and natural gas water discharge gas extraction. The concentric dropping-fishing type gas lifting tool comprises a dropping-fishing type gas lifting valve, a valve bag and a concentric gas lifting work tube, wherein the dropping-fishing type gas lifting valve is built in the valve bag, the valve bag is locked with the concentric gas lifting work tube through an X-shaped lock core, the gas lifting work tube and gas and water flowing passages (10 through holes with the diameter being 19mm) arranged in the work tube adopt the concentric structural design, and the outer side of a tube body of the work tube is symmetrically provided with two one-way valves. The concentric dropping-fishing type gas lifting tool and the use method have the advantages that the work tube and the gas and water flowing passages arranged in the work tube adopt the concentric structural design, the dropping-fishing operation of the gas lifting valve is simple and reliable, the dropping-fishing success rate is effectively improved, in addition, the pulling-resistant intensity of the work tube is high, and scales cannot be easily accumulated.

Description

technical field [0001] The invention relates to a CYT-1 concentric throwing and fishing type gas lift tool and a use method thereof, which belong to the technical field of petroleum and natural gas drainage and gas recovery. Background technique [0002] Lifting by injecting natural gas, liquid nitrogen / nitrogen, and removing oil / water in oil / gas-water wells, so as to extract oil / natural gas is one of the best economical methods in the process of modern oil recovery / drainage gas recovery. Gas injection It can go deep into the liquid through the gas lift valves at all levels from top to bottom, so that the weight of the liquid above the bottom of the tubing becomes lighter, and the back pressure on the production layer is reduced, so as to ensure the smooth and continuous production of oil / gas wells. [0003] At present, the fixed gas lift is widely used in the Sichuan-Chongqing gas field, that is, the gas lift tool is lowered into the oil and gas well along with the completi...

Claims

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Application Information

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IPC IPC(8): E21B43/00E21B23/00E21B31/12
CPCE21B23/00E21B31/12E21B43/122
Inventor 佘朝毅李长忠付永强尹强马辉运朱昆李奎邓友超刘振宇易德正熊杰蔡道钢
Owner PETROCHINA CO LTD
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